PHP - Session Lost From Same Page When Post?

As the title says session, post and get are not working. This is what i use to initialize them. For get just switch session with get.

Code: [Select]
foreach ($row as $val)
          { 
            $_SESSION[$rowcount] = $val;
//              echo "<td>$val</td>\n";
                $rowcount=$rowcount+1;
      }
when i was using session i would check to make sure that they were working with a couple of these lines in the same php document.

Code: [Select]
echo "Session row 1 = ".$_SESSION[0]."<br />";
echo "Session row 2 = ".$_SESSION[1]."<br />";
then on the next page where I was trying to receive the variables i was using this just to start off with and make sure i was getting the variables.

Code: [Select]
session_start();
if(!isset($_SESSION[1])){
echo "help1";}else{$var=$_SESSION[1];
}
echo $_SESSION[1];
echo $var;
if i switch to post and get i get the same results. if there is an easier way to pass variables between pages id love to hear them

This topic has been moved to Third Party PHP Scripts.

http://www.phpfreaks.com/forums/index.php?topic=315683.0

It's been a while since I've needed to whip anything substantial up from scratch, so my scripting is a little (lot) fast and loose (weird/inefficient) here.

I'm trying to mock up a script that's essentially a quiz/survey. There are a handful of topics, each with a few screens of yes/no questions. At the end, it returns a list of recommendations based on the answers gathered.

The script is posting back to itself. Using print_r ($_SESSION), it seems like all of the post values for the first screen of questions are being assigned to the session array as expected. When the second screen of questions is answered, their values are assigned as well, but the values for the first set go away completely. This continues through subsequent screens, with the values from the previous screen present and all others before missing.

I'd really appreciate a look at my code to see if you tell me the cause or error(s).

Thanks!


<?php
session_start;
include('_config.php');

// database connect
$dbc = mysqli_connect($CFG->dbhost, $CFG->dbuser, $CFG->dbpass, $CFG->dbname);

// set to section 1, page 1 if no values are in _POST array
  if (($_SERVER['REQUEST_METHOD'] ==  'GET') || (!isset($_POST['section']))) {
   $section = 1;
   $page  = 1;
  }
  else {
// something was posted, so...set those values in session variable
foreach($_POST as $key => $data) { 
$_SESSION[$key] = $data; 
}
// debug: display contents of the session array
print_r ($_SESSION);

// which section and page?
   $section = (int) $_POST['section'];
   $page  = (int) $_POST['next'];
  }

// check if last topic
$query = "SELECT * FROM hw_topics";
$data = mysqli_query($dbc, $query);
  if ($section == mysqli_num_rows($data)) {
    $last_section = true; 
  }
  else {
    $last_section = false;
  }

// get current topic name and info
$query = "SELECT topic, display_name, pages_in_topic FROM hw_topics WHERE topic_id = '$section'";
$data = mysqli_query($dbc, $query);
if (mysqli_num_rows($data) == 1) {
  $row = mysqli_fetch_array($data);
  $topic_display_name = $row['display_name'];
  $pages_in_topic = $row['pages_in_topic'];
  }

// test if last page in topic
$topic_pages = $row['pages_in_topic'];
if ($page == $topic_pages) {
    $last_page_in_section = true;
  }
  else {
    $last_page_in_section = false;
  }

// set form action (set to this script or to recommendations when last section is complete 
if (($last_section == true) && ($last_page_in_section == true)) {
    $form_action = $CFG->reccomend;
  }
  else {
    $form_action = $_SERVER['PHP_SELF'];
  }

// get current page headline
$query = "SELECT page_headline FROM hw_pages WHERE topic_id = '$section' AND page_number = '$page'";
$data = mysqli_query($dbc, $query);

if (mysqli_num_rows($data) == 1) {
  // The headline row was found so display the headline
  $row = mysqli_fetch_array($data);
  $page_headline = '<h2>' . $row['page_headline'] . '</h2>';
  }


// Grab the question data from the database to generate the list and form fields
$query = "SELECT question_id, question_number, question_text FROM hw_questions WHERE topic_id = '$section' AND page_id = '$page' ORDER BY question_number";
$data = mysqli_query($dbc, $query);
$questions = array();
  while ($row = mysqli_fetch_array($data)) {
    array_push($questions, $row);
  }

include($CFG->includesdir.'/header.php');
?>
<div id="head">
<h1>Assessment<?php if (isset($topic_display_name)) { echo ': <em>' . $topic_display_name  . '</em>'; } ?></h1>
<p class="paging">Page <?php echo $page; ?> of <?php echo $pages_in_topic; ?></p>
</div><!-- #head -->
<div id="content">
<p class="instr">Please complete this survey. We'll generate a list of recommendations and resources for your organization.</p>

<div id="questions">
<?php echo $page_headline; ?>
<form method="post" action="<?php echo $form_action; ?>">

<table border="0" cellpadding="0" cellspacing="0">
<thead>
<tr>
<td></td>
<td class="qtext"></td>
<td class="qanswer">yes</td>
<td class="qanswer">no</td>
<td class="pad"></td>
</tr>
</thead>

<?php 
if ($questions) { 
    // display question rows
    foreach ($questions as $question) {
      echo '<tr>';
      echo '<td class="qnumber">' . $question['question_number'] . '.</td>';
      echo '<td class="qtext"><p>...' . $question['question_text'] . '</p></td>';
      echo '<td class="qanswer"><div class="radio" id="box-yes"><input type="radio" value="yes" name="qid_' . $question['question_id'] . '" id="qid_' . $question['question_id'] . '" class="radio" /></div></td>';
      echo '<td class="qanswer"><div class="radio" id="box-no"><input type="radio" value="no" name="qid_' . $question['question_id'] . '" id="qid_' . $question['question_id'] . '" class="radio"';
      $field_name = 'qid_' . $question['question_id'];
      if (isset($_SESSION[$field_name])) {
        echo ' checked="checked"';
      }
      echo ' /></div></td>';
      echo '<td class="pad"></td>';
      echo '</tr>';
    }
  }
  else {
    echo '<tr>';
    echo '<td colspan="3" class="qtext"><p>No questions found in the database for this page.</p></td>';
    echo '<td class="pad"></td>';
    echo '</tr>';
  }
?>
</table>

<ul id="controls">
<?php 
if ($last_page_in_section == true) 
  { 
  $section++; 
  $page = 1; 
  } 
  else {
  $page++;
  }
  echo '<input type="hidden" value="' . $section . '" name="section" />';
  echo '<input type="hidden" value="' . ($page) . '" name="next" />';
  if (($last_section == true) &&  ($last_page_in_section == true)) {
    echo '<li><input type="submit" value="Submit Answers and Get Recommendations" name="submit" id="submit" /></li>';
  }
  else {
    echo '<li><input type="submit" value="Next Page" name="submit" id="next" /></li>'; 
  }
?>
</ul><!-- #controls -->
</form>
</div><!-- #questions -->

<?php
mysqli_close($dbc);
include($CFG->includesdir.'/footer.php');
?>

ONE of my SESSION values isn't remaining after login while others do.

This works fine on my localhost, it's on the live site that there is a problem and it just started yesterday. Before that it worked great.

Out of the four SESSIONs made I can only echo three values on other pages, member id the most important doesn't transfered to other pages

Notes: all these files are in the same folder, there is a SESSION started for the member id on the login page, you can see that it is used in the redirect below and the redirect works fine with the redirect going to the correct page " $home/member/index.php?user=$id_mem "

Here is the login page
// Here's the basic login page info
<?php # login.php
session_start();
ob_start() 
...connect to db & header called...
...Form validation.....

if ($e && $p) { // If everything's OK.
// Query the database:
$q = "SELECT id_mem, display_name, mem_group FROM sn_members WHERE (email='$e' AND password=SHA1('$p')) AND active IS NULL";
$r = mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc));
//  or die("Error: ".mysqli_error($dbc));

if (@mysqli_num_rows($r) == 1) { // If a match was made.

// Register the values & redirect:
// Give SELECTED elements a session
$_SESSION = mysqli_fetch_array ($r, MYSQLI_ASSOC);
$_SESSION['agent'] = md5($_SERVER['HTTP_USER_AGENT']);
mysqli_free_result($r);

// Update db for last login
$id_mem = $_SESSION['id_mem']; // <<< SESSION member id has a value here because it's used in the redirect below
$ip = $_SERVER['REMOTE_ADDR']; // Get ip address of person logging in
$q = "UPDATE sn_members SET last_login = Now(), ip = '$ip' WHERE id_mem = '$id_mem' LIMIT 1";
$r = mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc));

header("Location: $home/member/index.php?user=$id_mem");
exit(); // Quit the script.

}
?>


Here is the main page that a user would be redirect to above
<?php // /member/ all member info is through this folder
session_start();
ob_start();

if (isset($_GET['user']) && is_numeric($_GET['user'])) {
$user = $_GET['user'];
$user = $user;
if ($user < 0) {
header("Location: $home/index.php");
exit();
}
}

if ((!isset($_SESSION['id_mem']))  && (!isset($_SESSION['agent']) OR ($_SESSION['agent'] != md5($_SERVER['HTTP_USER_AGENT'])))){
// If not a logged in member redirect
header("Location: $home/index.php");
exit(); // Quit the script.
}
?>

Thanks in advance for the help
SJ

lets say I have two pages:

Code: [Select]
one.php

Code: [Select]
two.php
Now with that in mind, is there a way for page one.phpto automatically post values to page two.php viathe $_POST variable?

Hi

I need some help.
I wanted to create a start and end event date using date picker and also after selecting the start and end date, it will calculate the number of days (duration).
I have found the date picker which can do what I want but I need help to post the duration to another php page when user click on submit.

Can anyone help me.
You might want to refer to my attach PHP page and here is the link to the datepicker, http://www.kelvinluck.com/assets/jquery/datePicker/v2/demo/datePickerStartEnd.html

Thanks
Ben Chew

[attachment deleted by admin]

I want my form to POST to the same page, but not have the 'document expired' problem when sessions are being used somewhere in the script (when I hit press the back button in the browser). I know this can be avoided by posting to a different PHP page, and then use a header(location) to redirect, but I ideally want to keep it on the same page as I use some of the variables produced from within the processing section.    Please excuse the crude examples,   This works:

session_start();

/*HEADER*/
if(isset($_POST['test']){
    
    //do some validation
    $validated= true;
    
    if($validated){
        //process the form
        $_SESSION['notification'] = 'form submitted successfully';
        header('location: samepage.php');
        exit;
    }
    else{
        $_SESSION['notification'] = 'there was an error';
        header('location: samepage.php');
        exit;
    }
}

/*BODY*/
if(!isset($_SESSION['notification'])){
     //show the form.. posts 'test' to current page
}
else {
    echo $_SESSION['notification'];
    unset($_SESSION['notification']);
}

And this method shows the document expired when the page is refreshed...

session_start();

/*HEADER*/
if(isset($_POST['test']){
    
    //do some validation
    $validated= true;
    
    if($validated){
        //process the form
        $success = true;
    }
    else{
        $success = false;
    }
}

/*BODY*/
if(!isset($success)){
     //show the form.. posts 'test' to current page
}
else if($success){
     echo 'form submitted successfully';
}
else{
     echo 'there was an error';
}

I've read that I can edit the php.ini file to allow caching, which should solve the issue for example 2.   Is example 1 the correct way to be doing this? It's been pointed out that I shouldn't be using 'exit' so much so I'm trying to explore the correct methods
Edited by paddy_fields, 31 July 2014 - 07:04 AM.

I'm building a login page that then redirects to a new page. But it seems the session isn't working. But I don't know much about sessions, so I'm not sure what I might be doing wrong.

The login page sets the session with this code:
Code: [Select]
// Fetch the result - This will tell us whether this user exists
      $userExists = mysql_fetch_assoc($doQuery);

      // If user exists log them in
      if($userExists){
        mysql_free_result($doQuery);
        mysql_close();

        // Set the SESSION variables

        $_SESSION['first_name'] = $userExists['first_name'];
        $_SESSION['id']         = $userExists['id'];

The page that it redirects to is this:
Code: [Select]
<?php 
session_start();
if(isset($_SESSION['id'])) {
      echo "<html><body><p> You are now logged in,{$_SESSION['ID']}.</p>"; 
      } else { 

echo 'something went wrong';
       exit(); 
       }
ob_end_flush();

?>

Hi. I have problem and I would like to know if anyone here has any ideas on how to fix it.

My home page is where my log in form resides. If I leave the home page to browse other pages of my site I want to stay logged in. However, when I return to the home page I see the log in form. The log in form should not be there if I already logged in. Instead I should see the welcome message. Which does appear after loggin in but does not stay on the home page when I leave the page and come back.
Code: [Select]
<?php
//Starts the PHP Sesssion
session_start();
//Includes the MYSLQ Connection Info from another PHP Page
include ('spartacus_mysql.php');
//Submits Log In Info to Database and encrypts Password
if (isset ($_POST['loginsubmit'])) {
$username = mysql_escape_string($_POST['username']);
$userpassword = mysql_escape_string(md5($_POST['userpassword']));

if (!empty ($username) && !empty ($userpassword)) {
//Runs Query to Selects the Username and Password from the Database
$sql = mysql_query ("SELECT * FROM users
WHERE username='".$username."' AND userpassword='".$userpassword."' LIMIT 1");
//Finds and Matches the Log In Info from the Database to the one submitted
if(mysql_num_rows ($sql) > 0) {
$_SESSION['loggedin'] = true;
$_SESSION['username'] = $username;
//Runs This Message if the right Username/Password is entered
echo
'<div id="welcome_member">
Welcome,&nbsp; '.$_SESSION['username'].'.<br />
You are now logged in!<br/>
The Combat Tips and Downloads is now accessible!<br />
Enjoy!<br />
</div>';
} else {
//Runs This Error if the Username/Password do not match the Database 
echo '<div id="welcome_member">
Your username and/or password is incorrect! <a href="spartacus_home.php">Try Again</a>
</div>';
}
} else {
//Runs This Code if the Log In Form is Left Blank
echo '<div id="welcome_member">
You must enter a username and a password! <a href="spartacus_home.php">Try Again</a> 
or <a href="spartacus_joinsite.php">Register</a>
</div>';
}
} else {
//This is the code for the Log in Form
echo'<div id="join">
<a href="spartacus_joinsite.php">{ JOIN! }</a><br />
</div>
<div class="signin">
<div id="titles">
{ SIGN IN }
</div><br />
<form method="post" action="spartacus_home.php">
<table>
<tr><td>
Username: <input type="text" name="username" />
</td></tr>
<tr><td>
&nbsp;Password: <input type="password" name="userpassword"/>
</td></tr>
<tr><td>
<input class="submit" name="loginsubmit" type="submit" />
</tr></td>
</table>
</form>
</div>';
}
?>
<!--end sign in PHP-->

Here is my code

I have my php pages set up like this:

1. log in with login.php

2. that sends you to main.php

3. in main.php, there are links to page-a.php, page-b.php, page-c.php, etc.

when you type in a password at login.php, it passes your input to main.php.

the correct password is hardcoded in main.php. if it matches, a session variable is set, which should be able to be used on page-a.php, page-b.php, page-c.php, etc. to verify that whoever accesses those pages has gone through the login process. if the session variable doesn't match (or null) the user is redirected to the login page.

also the session variable is checked (recursively) when accessing main.php, just like the other pages.

the problem is, it's as if each page starts over. the session variable does not make it beyond the page that sets it. it should be passed on to the next page but it's not.

I used an echo statement in page-a.php to verify and rem'd out the rest of the code. no echo because session value is null, page goes on to load the html. without the code rem'd out it redirects the user to login.php.

code:

LOGIN.PHP
<?
session_start();  
if(isset($_SESSION['aaa']))
unset($_SESSION['aaa']); 
?>
<html>
<head>
<title>title</title>
</head>
<body>
<table width="400" align="center" border="0" bordercolor="#000099" bordercolordark="#000066" bordercolorlight="#6666FF">
  <tr bgcolor="#B0C4DE"> 
    <td> 
      <form action="main.php" method="POST">
        <p align="center"><strong><font size="2" face="Verdana, Arial, Helvetica, sans-serif" color="#FFFFFF"><br>
          Password</font></strong> 
          <input name="pwfield" type="password" value size="20" maxlength=20>
<input type="submit" value="Login"></p>
      </form>
    </td></tr></table>
</body></html>

MAIN.PHP
<?
if ($_SESSION['aaa']!="abcdef")
{
$password="twinkies";
if ($_POST["pwfield"]==$password)
$_SESSION['aaa']="abcdef"; // successful login
else 
{header("Location: login.php"); exit();}
}
?> 
<html>
<head>
<title>title</title>
</head>
<body>
<a href="page-a.php">Page A</a>
<a href="page-b.php">Page B</a>
<a href="page-c.php">Page C</a>
</body></html>

PAGE-A.PHP
<?
echo $_SESSION['aaa'];
//if ($_SESSION['aaa']!="abcdef")
//header("Location: login.php");
//exit();
?>
<html>
<head>
<title>title</title>
</head>
<body>
...

hey guys

i'am newb in php and i'am doing some algorithm in php, in some codes i need to use session but in that particular page the code does not know if session_start() has been called or not.
wonder to if there is anyway that i can get if session is started or not in my code?

thanks in advance

Hi,
I have a user/password protected page that displays a list of clients.
When clicking on them you're redirected to the client record update page. This is how I am linking to taht page now:
Code: [Select]
<a href="DIST_clientes_update.php?id_cliente=<?php echo $row_clients_RS['id_cliente']; ?>The problem with this is that the client id is appended to the url and so if the user chnges it will be able to access records from a different user...and I dont want that.
So I have created a session:
Code: [Select]
$_SESSION["idCliente"] = $row_clients_RS['id_cliente'];but how do I pass it to the update page without showing in the url?
Thanks

I currently have a php form that asks for first name, last name and email address then when they click submit it sends me an email with this information.  I also have a javascript that pops up a window saying their message was sent with an ok button that redirects them back to the main page.  I'd like to change this to redirect them to a new php page with a certificate with their name on it taken from the previous php form (but still email me the information).  My form action currently points back to the same php page for verification of information (like valid email address, etc.) so I can't point that to a new page.  Is there any way to do this?  The variables I have for the first name and last name are just $firstname and $lastname.

When a person visits my site I would like for the form on the page to submit and reload with the predetermined search criteria.  Is this possible?

So for example...if you visited my site as soon as you entered the from would submit and display Google search results for "php freaks"

I tried header("location: mysite.com?q=php+freaks"); but that is a continuous loop.



-Any thoughts

Hi Everyone,

I wonder if somebody could help me. I have been at this for hours and am really struggling.

I have a timer which I have set up for a quiz.  The quiz opens in a javascript shadow box.  When the quiz is opened a session variable for the timer is set up to keep track of the time. 

What I need is for this session variable to end when the shadow box is closed. I have a onClose hook to peform actions when the shadow box is closed which is in javascript.

Obviously I cannot end the session variable in the javascript function due to js being client side and php being server side.

Has anyone any suggestions how I can resolve this issue.

I need to end this session variable as if the user exits the quiz and then selects another quiz to do the timer uses the current time session rather than assigning the new time value for that particular quiz.

Thanks in advance. 

Edd